What kind of bird? This would be a horrible place for any bird/animal.

The open area I can see is small but the number of small rocks moved from under the fake grass far exceed the little open area.

Pam D, the small hole is not in the fake grass; it is between the fake grass and the cement on the house. Armadillo is wayyyyyy too big for the little area. A mole, maybe but I thought they enjoyed the yard more than a stone dog run with fake grass.

I called my yard care/exterminator and he said it was a raccoon who decided there is something tasty under fake carpet & stone. He said that as soon as he doesn't find food he will leave. I don't want to harm the animal so he said I could put cayenne pepper in that area. I think I'll wait a week & see what happens. I understand they eat bugs and other nasty things. May the raccoon join the turkeys, ducks, possoms, sand hill cranes, bear,hawks and whatever else resides in my backyard.

Thank you Kathy R & Pam D. Who would have guessed a raccoon?

Let's see what happens next.